/* Corvian Verlag – Stylesheet
   Bewusst ohne externe Schriften/CDNs (DSGVO-freundlich).
   Farben aus dem Verlagslogo: Navy & Kupfer. */

:root {
  --paper: #fbf9f5;
  --paper-2: #f2ede5;
  --ink: #0b2340;
  --ink-soft: #4b5a6c;
  --line: #e2dbcf;
  --copper: #b8714a;
  --copper-dark: #94552f;
  --night: #071a30;
  --night-2: #0f2a48;
  --on-night: #f4efe6;
  --on-night-soft: #aab6c4;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max: 1160px;
  --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.5rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(2rem, 4vw, 2.8rem); }
h3 { font-size: 1.4rem; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-family: var(--sans); font-size: .78rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase; color: var(--copper); margin-bottom: 1rem;
}
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 60ch; }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .6rem 1rem; z-index: 100; }
.skip-link:focus { left: 1rem; top: 1rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .85rem 1.5rem; border-radius: var(--radius);
  font: 600 .95rem/1 var(--sans); text-decoration: none; cursor: pointer;
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  transition: background .2s, color .2s, border-color .2s;
}
.btn:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--copper { background: var(--copper); border-color: var(--copper); color: #fff; }
.btn--copper:hover { background: var(--copper-dark); border-color: var(--copper-dark); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; color: var(--ink); }
.brand img { width: 44px; height: auto; }
.brand span { font-family: var(--serif); font-size: 1.3rem; letter-spacing: .16em; text-transform: uppercase; line-height: 1; }
.brand small { display: block; font-family: var(--serif); font-size: .62rem; letter-spacing: .55em; color: var(--copper); margin-top: .3rem; }

.nav ul { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav a { text-decoration: none; font-size: .95rem; position: relative; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 0; height: 1px; background: var(--copper); transition: width .25s; }
.nav a:hover::after, .nav a[aria-current="true"]::after { width: 100%; }
.nav-toggle { display: none; background: none; border: 0; padding: .5rem; cursor: pointer; color: var(--ink); }
.nav-toggle span { display: block; width: 24px; height: 2px; background: currentColor; margin: 5px 0; transition: transform .25s, opacity .25s; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav { position: fixed; inset: 76px 0 auto 0; background: var(--paper); border-bottom: 1px solid var(--line); display: none; }
  .nav.is-open { display: block; }
  .nav ul { flex-direction: column; gap: 0; padding: .5rem 24px 1.5rem; }
  .nav li a { display: block; padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Hero */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 8vw, 6rem); overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1.15fr 1fr; gap: 4rem; align-items: center; }
.hero-logo { width: min(320px, 70%); margin-bottom: 2rem; }
.hero h1 em { font-style: italic; color: var(--copper); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.hero-art { position: relative; aspect-ratio: 5 / 6; }
.hero-art img { position: absolute; width: 50%; height: auto; border-radius: 2px 5px 5px 2px; box-shadow: 0 30px 60px -20px rgba(7,26,48,.5); }
.hero-art img:nth-child(1) { left: 0; top: 10%; transform: rotate(-6deg); }
.hero-art img:nth-child(2) { right: 0; top: 2%; transform: rotate(5deg); }
.hero-art img:nth-child(3) { left: 25%; top: 20%; transform: rotate(-1deg); z-index: 2; }
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; margin: 0 auto; width: 100%; }
}

/* Buchcover */
.cover-img {
  width: 100%; height: auto; aspect-ratio: 5 / 8; object-fit: cover;
  border-radius: 2px 5px 5px 2px;
  box-shadow: 0 16px 32px -16px rgba(7,26,48,.45);
  background: var(--paper-2);
}

/* Sections */
section { scroll-margin-top: 84px; }
.section { padding: clamp(4rem, 9vw, 7rem) 0; }
.section--alt { background: var(--paper-2); }
.section--dark { background: var(--night); color: var(--on-night); }
.section--dark .lead { color: var(--on-night-soft); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 3rem; flex-wrap: wrap; }
.section-head .lead { margin: 0; }

/* Reihe Lena Falk */
.series { display: grid; grid-template-columns: 1fr 1.1fr; gap: 4rem; align-items: center; }
.series-covers { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.series-covers a { display: block; text-decoration: none; }
.series-covers span { display: block; margin-top: .8rem; font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: var(--on-night-soft); }
.series-covers .cover-img { transition: transform .3s; }
.series-covers a:hover .cover-img { transform: translateY(-6px); }
.section--dark .btn { background: var(--on-night); color: var(--ink); border-color: var(--on-night); }
.section--dark .btn:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
@media (max-width: 820px) { .series { grid-template-columns: 1fr; gap: 2.5rem; } }

/* Programm-Filter */
.filters { display: flex; gap: .5rem; flex-wrap: wrap; }
.filter {
  font: 500 .88rem/1 var(--sans); padding: .6rem 1rem; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer;
}
.filter[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.books { display: grid; gap: 3rem; }
.book { display: grid; grid-template-columns: 200px 1fr; gap: 2.5rem; align-items: start; padding-bottom: 3rem; border-bottom: 1px solid var(--line); }
.book:last-child { border-bottom: 0; padding-bottom: 0; }
.book[hidden] { display: none; }
.book__genre { font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--copper); font-weight: 600; }
.book__title { font-family: var(--serif); font-size: 1.8rem; margin: .3rem 0 .2rem; }
.book__subtitle { font-family: var(--serif); font-size: 1.1rem; color: var(--ink-soft); font-style: italic; margin: 0 0 .5rem; }
.book__author { font-size: .95rem; margin: 0 0 1.2rem; }
.badge { display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; background: var(--copper); color: #fff; padding: .25rem .5rem; border-radius: 2px; margin-left: .5rem; vertical-align: middle; }
.formats { list-style: none; margin: 0 0 1.4rem; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: .8rem; }
.formats a {
  display: block; text-decoration: none; padding: .8rem 1rem; border: 1px solid var(--line);
  border-radius: var(--radius); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.formats a:hover { border-color: var(--copper); box-shadow: 0 6px 16px -10px rgba(7,26,48,.4); }
.formats strong { display: block; font-size: .9rem; }
.formats .price { font-family: var(--serif); font-size: 1.25rem; }
.formats .shop { display: block; font-size: .78rem; color: var(--copper-dark); margin-top: .2rem; }
.book__isbn { font-size: .82rem; color: var(--ink-soft); margin: 0; }
@media (max-width: 640px) {
  .book { grid-template-columns: 110px 1fr; gap: 1.2rem; }
  .book__title { font-size: 1.35rem; }
  .formats { grid-column: 1 / -1; }
}

/* Autoren */
.authors { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.author { background: var(--paper); border: 1px solid var(--line); padding: 2rem; border-radius: var(--radius); }
.avatar {
  width: 72px; height: 72px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--serif); font-size: 1.5rem; color: var(--on-night); background: var(--ink); margin-bottom: 1.2rem;
}
.author h3 { margin-bottom: .2rem; }
.author .role { font-size: .85rem; color: var(--copper); margin-bottom: .8rem; }
.author p:last-child { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* Über uns */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: 4rem; align-items: center; }
.about-logo { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 3rem; }
.values { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 1.2rem; }
.values li { display: grid; grid-template-columns: 2.5rem 1fr; gap: 1rem; }
.values strong { display: block; font-family: var(--serif); font-size: 1.15rem; font-weight: 500; }
.values .num { font-family: var(--serif); color: var(--copper); font-size: 1.4rem; }
@media (max-width: 820px) { .about { grid-template-columns: 1fr; gap: 2.5rem; } .about-logo { padding: 2rem; } }

/* Kontakt */
.contact { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; }
.contact address { font-style: normal; margin-bottom: 1.5rem; }
.contact dl { display: grid; grid-template-columns: auto 1fr; gap: .5rem 1.5rem; margin: 1.5rem 0; }
.contact dt { color: var(--ink-soft); }
.contact dd { margin: 0; }
.form { display: grid; gap: 1rem; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form label { display: grid; gap: .35rem; font-size: .88rem; font-weight: 600; }
.form input, .form textarea, .form select {
  font: inherit; font-weight: 400; padding: .8rem 1rem; border: 1px solid var(--line);
  background: #fff; border-radius: var(--radius); color: var(--ink); width: 100%;
}
.form textarea { min-height: 150px; resize: vertical; }
.form .check { display: flex; gap: .6rem; align-items: start; font-weight: 400; font-size: .85rem; color: var(--ink-soft); }
.form .check input { width: auto; margin-top: .3rem; }
.form-note { font-size: .9rem; min-height: 1.4em; margin: 0; }
@media (max-width: 820px) { .contact { grid-template-columns: 1fr; gap: 2.5rem; } .form .row { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { background: var(--night); color: var(--on-night-soft); padding: 4rem 0 2rem; font-size: .92rem; }
.site-footer .grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 3rem; }
.site-footer h4 { font-family: var(--sans); font-size: .75rem; letter-spacing: .16em; text-transform: uppercase; color: var(--on-night); margin-bottom: 1rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--on-night); }
.site-footer .brand { color: var(--on-night); }
.site-footer .bottom { border-top: 1px solid #1d3654; padding-top: 1.5rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .82rem; }
@media (max-width: 820px) { .site-footer .grid { grid-template-columns: 1fr 1fr; } }

/* Rechtstexte */
.legal { padding: 4rem 0 6rem; }
.legal .container { max-width: 780px; }
.legal h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); margin-bottom: 2rem; }
.legal h2 { font-size: 1.5rem; margin-top: 2.5rem; }

/* Reveal-Animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .series-covers a:hover .cover-img { transform: none; }
}